Harris Platinum HT EL 2000LS, Technical Manual

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M/NTSC B/PAL U6-4 Voltage
2 E2, E3 .35 Volts
3 E4 .45 Volts
4 .62 Volts
5 .75 Volts
6 .85 Volts
7 E5 .45 Volts
8 E6 .55 Volts
9 E7 .62 Volts
10 .70 Volts
11 E8 .77 Volts
12 E9 .85 Volts
13 E10-E12 .95 Volts
Using a test load with low VSWR, measure the DC voltage of
the forward sample at the feed through to the logic printed wiring
or at junction of R5 and C4 for reference.
At the reflected sample feedthrough or at the anode of CR1 inject
a DC voltage. Slowly increase the voltage until the module faults.
It should trip at a voltage 0.84 times the ref/-10%.
To adjust the trip threshold set the injected voltage to 0.84 times the
forward reference and adjust R101 until the module faults off.
This accounts for the 6 dB pad on the forward sample line and
scales the trip point to be the equivalent of 2.5:1 VSWR.
Appendix A - RF Amplifier Modules
888-2457-001 A-17
WARNING: Disconnect primary power prior to servcing.