Cisco Multimedia Line Equalizer/Reverse Conditioner 1.25 GHz Data Sheet
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The Cisco® 1.25 GHz Multimedia Line Equalizer/Reverse Conditioner (LEQ/RC), shown in Figure 1, improves network performance on both the forward and reverse paths in a coaxial transmission system.
In the forward path, the fixed forward equalizer offsets undesirable down-tilt associated with cumulative cable and passive losses, allowing tap port RF levels to be maintained within desired design limits, even at taps located near the ends of lines.
In the reverse path, plug-in attenuation allows RF levels to be conditioned for optimal performance of critical reverse path services. By selectively adding reverse attenuation at Cisco Multimedia LEQ/RC locations, the range of RF levels transmitted from closed-loop customer premises equipment in a given service area can be narrowed considerably.
With greater percentages of network devices transmitting in the upper end of their RF transmit ranges, improvements in carrier-to-ingress and carrier-to-noise performance can be realized.
Features
● Fixed 9 dB or 11 dB forward equalizers
● Plug-in attenuator location for reverse-path optimization
● Connection beam noninterruptible AC and RF bypass (Figure 2) that optimizes network availability during maintenance periods
● Equalizer in and out bypass, which allows reverse conditioning deployment network locations where forward equalization is not desired
● 15A current passing capability, which allows placement in all portions of the network
● 6 kV surge protection
● Circuit contained in faceplate, compatible with existing Cisco line equalizer products
● Rugged, polymer-coated housing that provides reliable performance in the most challenging environments; additional labels provided in packaging mark the tap containing a DC/EQ module
Product Specifications
Tables 1 through 7 provide product specifications.
Table 1. Insertion Loss
| Insertion Loss 42/54 MHz |
||||||
| Frequency |
Bypass Mode |
Equalization Mode |
||||
| 9 dB |
11 dB |
|||||
| Typical |
Maximum |
Typical |
Maximum |
Typical |
Maximum |
|
| 5 MHz |
–0.5 |
–1.0 |
–0.5 |
–1.0 |
–0.5 |
–1.0 |
| 10 MHz |
–0.4 |
–1.2 |
–0.4 |
–1.2 |
–0.4 |
–1.2 |
| 42 MHz |
–0.7 |
–1.3 |
–0.7 |
–1.5 |
–0.7 |
–1.5 |
| 54 MHz |
–1.2 |
–1.5 |
–9.9 |
–10.1 |
–11.6 |
–11.7 |
| 100 MHz |
–0.6 |
–1.5 |
–9.4 |
–9.5 |
–10.9 |
–11.0 |
| 550 MHz |
–1.0 |
–1.6 |
–6.0 |
–6.1 |
–6.7 |
–6.8 |
| 750 MHz |
–1.1 |
–1.8 |
–4.9 |
–5.0 |
–5.4 |
–5.5 |
| 870 MHz |
–1.4 |
–2.0 |
–4.3 |
–4.4 |
–4.7 |
–4.8 |
| 1000 MHz |
–1.9 |
–2.2 |
–3.6 |
–3.7 |
–3.9 |
–4.0 |
| 1218 MHz |
–2.2 |
–2.4 |
–2.7 |
–2.8 |
–2.8 |
–2.9 |
| 1250 MHz |
–2.3 |
–2.5 |
–2.6 |
–2.7 |
–2.6 |
–2.7 |
| Insertion Loss 65/86 MHz |
||||||
| Frequency |
Bypass Mode |
Equalization Mode |
||||
| 9 dB |
11 dB |
|||||
| Typical |
Maximum |
Typical |
Maximum |
Typical |
Maximum |
|
| 5 MHz |
–0.5 |
–1.0 |
–0.5 |
–1.0 |
–0.5 |
–1.0 |
| 10 MHz |
–0.4 |
–1.0 |
–0.4 |
–1.0 |
–0.4 |
–1.0 |
| 40 MHz |
–0.7 |
–1.0 |
–0.7 |
–1.0 |
–0.7 |
–1.0 |
| 65 MHz |
–1.0 |
–1.5 |
–1.0 |
1.5 |
–1.0 |
–1.5 |
| 86MHz |
–1.1 |
–1.3 |
–9.5 |
–9.6 |
–11.1 |
–11.2 |
| 550 MHz |
–1.0 |
–1.4 |
–6.0 |
–6.1 |
–6.7 |
–6.8 |
| 750 MHz |
–1.1 |
–1.8 |
–4.9 |
–5.0 |
–5.4 |
–5.5 |
| 870 MHz |
–1.4 |
–2.0 |
–4.3 |
–4.4 |
–4.7 |
–4.8 |
| 1000 MHz |
–1.9 |
–2.2 |
–3.7 |
–3.8 |
–3.9 |
–4.0 |
| 1218 MHz |
–2.2 |
–2.4 |
–2.7 |
–2.8 |
–2.8 |
–2.9 |
| Insertion Loss 85/102 MHz |
||||||
| Frequency |
Bypass Mode |
Equalization Mode |
||||
| 9 dB |
11 dB |
|||||
| Typical |
Maximum |
Typical |
Maximum |
Typical |
Maximum |
|
| 5 MHz |
–0.5 |
–1.0 |
–0.5 |
–1.0 |
–0.5 |
–1.0 |
| 10 MHz |
–0.4 |
–1.0 |
–0.4 |
–1.0 |
–0.4 |
–1.0 |
| 40 MHz |
–0.7 |
–1.0 |
–0.7 |
–1.0 |
–0.7 |
–1.0 |
| 85 MHz |
–1.0 |
–1.5 |
–1.3 |
–1.5 |
–1.3 |
–1.5 |
| 102 MHz |
–1.1 |
–1.5 |
–9.3 |
–9.4 |
–10.8 |
–10.9 |
| 550 MHz |
–1.0 |
–1.4 |
–6.0 |
–6.1 |
–6.7 |
–6.8 |
| 750 MHz |
–1.1 |
–1.8 |
–4.9 |
–5.0 |
–5.4 |
–5.5 |
| 870 MHz |
–1.4 |
–2.0 |
–4.3 |
–4.4 |
–4.7 |
–4.8 |
| 1000 MHz |
–1.9 |
–2.2 |
–3.7 |
–3.8 |
–3.9 |
–4.0 |
| 1218 MHz |
–2.2 |
–2.4 |
–2.7 |
–2.8 |
–2.8 |
–2.9 |
| 1250 MHz |
–2.3 |
–2.5 |
–2.6 |
–2.7 |
–2.6 |
–2.7 |
| Insertion Loss 204/258 MHz |
||||||
| Frequency |
Bypass Mode |
Equalization Mode |
||||
| 9 dB |
11 dB |
|||||
| Typical |
Maximum |
Typical |
Maximum |
Typical |
Maximum |
|
| 5 MHz |
–0.5 |
–1.0 |
–0.5 |
–1.0 |
–0.5 |
–1.0 |
| 10 MHz |
–0.4 |
–1.0 |
–0.4 |
–1.0 |
–0.4 |
–1.0 |
| 40 MHz |
–0.7 |
–1.0 |
–0.7 |
–1.0 |
–0.7 |
–1.0 |
| 204 MHz |
–1.0 |
–1.6 |
–1.0 |
–1.6 |
–1.0 |
–1.6 |
| 258 MHz |
–1.1 |
–2.0 |
–7.9 |
–8.3 |
–9.1 |
–9.8 |
| 550 MHz |
–1.0 |
–1.4 |
–6.0 |
–6.1 |
–6.7 |
–6.8 |
| 750 MHz |
–1.1 |
–1.8 |
–4.9 |
–5.0 |
–5.4 |
–5.5 |
| 870 MHz |
–1.4 |
–2.0 |
–4.3 |
–4.4 |
–4.7 |
–4.8 |
| 1000 MHz |
–1.9 |
–2.2 |
–3.7 |
–3.8 |
–3.9 |
–4.0 |
| 1218 MHz |
–2.2 |
–2.4 |
–2.7 |
–2.8 |
–2.8 |
–2.9 |
| 1250 MHz |
–2.3 |
–2.5 |
–2.6 |
–2.7 |
–2.6 |
–2.7 |
Table 2. Return Loss
| Return Loss |
||||||
| Frequency |
Bypass Mode |
Equalization Mode |
||||
| 9 dB |
11 dB |
|||||
| Typical |
Minimum |
Typical |
Minimum |
Typical |
Minimum |
|
| 5 to 10 MHz |
–16 dB |
–15.5 |
16 dB |
–15.5 |
–16 dB |
–15.5 |
| 11 to 1000 MHz |
–17 dB |
–16 |
17 dB |
–16 |
–17 dB |
–16 |
| 1001 to 1250 MHz |
–17 dB |
–16 |
17 dB |
–16 |
–17 dB |
–16 |
Table 3. Flatness
| Flatness |
||||||
| Frequency |
Bypass Mode |
Equalization Mode |
||||
| 9 dB |
11 dB |
|||||
| Typical |
Maximum |
Typical |
Maximum |
Typical |
Maximum |
|
| 5 to 204 MHz |
0.65 dB |
0.65 dB |
0.65 dB |
0.65 dB |
0.65 dB |
0.65 dB |
| 205 to 1250 MHz |
0.75 dB |
0.75 dB |
0.75 dB |
0.75 dB |
0.75 dB |
0.75 dB |
Table 4. Group Delay
| Group Delay 42/54 MHz |
||
| Frequency |
Typical |
Maximum |
| Forward |
||
| 91.25–94.83 MHz |
3 ns |
20 ns |
| 97.25–100.83 MHz |
3 ns |
10 ns |
| Reverse |
||
| 5.0–6.5 MHz |
39 ns |
40 ns |
| 6.5–8.0 MHz |
20 ns |
30 ns |
| 8.0–9.5 MHz |
10 ns |
15 ns |
| 37.5–39.0 MHz |
2 ns |
15 ns |
| 39.0–40.5 MHz |
6 ns |
20 ns |
| 40.5–42.0 MHz |
7 ns |
30 ns |
| Group Delay 65/86 MHz |
||
| Frequency |
Typical |
Maximum |
| Forward |
||
| 91.25–94.83 MHz |
3 ns |
20 ns |
| 97.25–100.83 MHz |
3 ns |
10 ns |
| Reverse |
||
| 5.0–6.5 MHz |
40 ns |
40 ns |
| 6.5–8.0 MHz |
10 ns |
30 ns |
| 8.0–9.5 MHz |
11 ns |
15 ns |
| 60.5–62.0 MHz |
27ns |
15 ns |
| 62.0–63.5 MHz |
11 ns |
20 ns |
| 63.5–65 MHz |
14 ns |
30 ns |
| Group Delay 85/102 MHz |
||
| Frequency |
Typical |
Maximum |
| Forward |
||
| 109.25 to 112.83 MHz |
15 ns |
20 ns |
| 115.25 to 118.83 MHz |
7 ns |
10 ns |
| Reverse |
||
| 5.0 to 6.5 MHz |
40 ns |
40 ns |
| 6.5 to 8.0 MHz |
20 ns |
30 ns |
| 8.0 to 9.5 MHz |
9 ns |
15 ns |
| 80.5 to 82.0 MHz |
9 ns |
15 ns |
| 82.0 to 83.5 MHz |
8 ns |
20 ns |
| 83.5 or 85 MHz |
17 ns |
30 ns |
| Group Delay 204/258 MHz |
||
| Frequency |
Typical |
Maximum |
| Forward |
||
| 259.2625–262.85 MHz |
4 ns |
20 ns |
| 265.2625–268.85 MHz |
2 ns |
10 ns |
| 271.2625–274.85 MHz |
2 ns |
10 ns |
| Reverse |
||
| 201.0 to 202.5 MHz |
1 ns |
10 ns |
| 202.5 to 204.0 MHz |
2 ns |
10 ns |
Table 5. Power Passing
| Power Passing |
|||
| Frequency |
Bypass Mode |
Equalization Mode |
|
| 9 dB |
11 dB |
||
| 5 to 1250 MHz |
15A |
15A |
15A |
Table 6. Hum Modulation
| Hum Modulation |
|||
| Frequency |
Bypass Mode |
Equalization Mode |
|
| 9 dB |
11 dB |
||
| 5 to 1250 MHz |
–65 dBc @15A |
–65 dBc @15A |
–65 dBc @15A |
Table 7. Safety and Compliance
| Safety and Compliance |
|
| Items |
Specs |
| EMC |
EN50083-2, EN55022 Class A, EN55024 Class A, and FCC Part 76/Part 15 |
| Safety standards |
EN/IEC 60065, UL 497, 1459, and 1950 |
Note:
1. Chrominance and luminance at 3.58 MHz above the video carrier.
2. Propagation delay in 2 MHz bandwidth.
3. Unless otherwise noted, all the specifications in Table 1 through Table 7 reflect typical station performance at stated reference levels in the recommended operating configurations. Specifications are based on measurements made in accordance with SCTE/ANSI standards (where applicable), using standard frequency assignments.
Ordering Information
To place an order, visit the Cisco Ordering Home Page and refer to Table 8 and Table 9, which list the part numbers for the Cisco Multimedia LEQ/RC.
Table 8. Ordering Information
| Description |
Part Number |
| Cisco Multimedia LEQ/RC, 42/54 MHz split, 9 dB Forward EQ |
SG-LEQ-RC-4254-09 |
| Cisco Multimedia LEQ/RC, 42/54 MHz split, 11 dB Forward EQ |
SG-LEQ-RC-4254-11 |
| Cisco Multimedia LEQ/RC, 65/86 MHz split, 9 dB Forward EQ |
SG-LEQ-RC-6586-09 |
| Cisco Multimedia LEQ/RC, 65/86 MHz split, 11 dB Forward EQ |
SG-LEQ-RC-6586-11 |
| Cisco Multimedia LEQ/RC, 85/105 MHz split, 9 dB Forward EQ |
SG-LEQ-RC-8502-09 |
| Cisco Multimedia LEQ/RC, 85/105 MHz split, 11 dB Forward EQ |
SG-LEQ-RC-8502-11 |
| Cisco Multimedia LEQ/RC, 204/258 MHz split, 9 dB Forward EQ |
SG-LEQ-RC-0458-09 |
| Cisco Multimedia LEQ/RC, 204/258 MHz split, 11 dB Forward EQ |
SG-LEQ-RC-0458-11 |
| Cisco Multimedia LEQ/RC Faceplate, 42/54 MHz split, 9 dB Forward EQ |
SG-LEQ-RC-425409FP |
| Cisco Multimedia LEQ/RC Faceplate, 42/54 MHz split, 11 dB Forward EQ |
SG-LEQ-RC-425411FP |
| Cisco Multimedia LEQ/RC Faceplate, 65/86 MHz split, 9 dB Forward EQ |
SG-LEQ-RC-658609FP |
| Cisco Multimedia LEQ/RC Faceplate, 65/86 MHz split, 11 dB Forward EQ |
SG-LEQ-RC-658611FP |
| Cisco Multimedia LEQ/RC Faceplate, 85/102 MHz split, 9 dB Forward EQ |
SG-LEQ-RC-850209FP |
| Cisco Multimedia LEQ/RC Faceplate, 85/102 MHz split, 11 dB Forward EQ |
SG-LEQ-RC-850211FP |
| Cisco Multimedia LEQ/RC Faceplate, 204/258 MHz split, 9 dB Forward EQ |
SG-LEQ-RC-045809FP |
| Cisco Multimedia LEQ/RC Faceplate, 204/258 MHz split, 11 dB Forward EQ |
SG-LEQ-RC-045811FP |
Table 9. Plug-In Attenuators
| Value |
Part Number |
Value |
Part Number |
Value |
Part Number |
| 0 dB |
574475 |
6 dB |
574481 |
12 dB |
574487 |
| 1 dB |
574476 |
7 dB |
574482 |
13 dB |
574488 |
| 2 dB |
574477 |
8 dB |
574483 |
14 dB |
574489 |
| 3 dB |
574478 |
9 dB |
574484 |
15 dB |
574490 |
| 4 dB |
574479 |
10 dB |
574485 |
75 ohm |
574496 |
| 5 dB |
574480 |
11 dB |
574486 |
|
|
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For More Information
Cisco Multimedia Line Equalizer/Reverse Conditioner products include some of the industry's most complete range of high-performance components. For additional information, go to http://www.cisco.com/en/US/products/ps9101/index.html.
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