[R-390] Call for measurements - 100dB carrier reading

[Graham Baxter]

Good morning Dave

HP8640B generator, through terminated in 50 ohm. Plugged to J513 with
J518 disconnected. Voltages are PD across 50 ohm.


                RF DECK UNPLUGGED      RF DECK PLUGGED IN        MGC
Input PD   Diode load    AGC                Diode load     AGC
      Diode load
150uV       -5.6v            -450mV            -5.6
-289mV           -7.0v
1mV         -6.9v            -3.3v                 -7.9
-2.95v              -44v
10mV       -8.5v            -7.5v                 -9.9v
-6.9v                -103
100mV      -11.3v         -13.6v               -13.5v
-12.8v              -79v (O/L)

In addition, with the RF deck plugged in, I dropped the AGC rear panel link.

I measured the open loop AGC voltage developed with the function switch at AGC.

150 uV    -1.3v
300 uV    -14.5v
1mV       -29.1v

Graham
G8OAD