Table 11-4 Rf Section Mnemonic Table - HP 8560E Service Manual

RF Section
A15 RF Assembly
Table 11-4 RF Section Mnemonic Table
Mnemonic
MAIN COIL+, MAIN
COIL−
FM+, FM−
LO SENSE
LEVEL ADJUST
GATE BIAS
HEXTMIXB
HSIGIDOFFA
PIN DIODE SWITCH
MIXER BIAS
RFGAIN
RFGAIN1 and RFGAIN2 Currents to drive PIN diodes in flatness comp. amps.
L10dB A, L20dB B,
L40dB C
10dB A, 20dB B, 40dB C
LDC D, LAC D
606
Description
YTO main coil tune signal
YTO FM coil tune signal
LO amplitude sense voltage
LO amplitude adjustment voltage (PIN ATTEN)
LODA gate bias voltage
External Mixer:
SIG ID Oscillator ON:
PIN diode switch control for 2ND conv. IF output
Detected voltage on 2ND converter mixer diode
Voltage to control gain of flatness comp. amps.
Control lines to set attenuator sections A, B, and C
to attenuate position (active low)
Control lines to set attenuator sections A, B, and C
to attenuate position (active high)
Control lines to toggle DC/AC input
+12V=EXT MIX
−12V=INT MIX
+12V=SIG ID OFF
−8V=SIG ID ON
Chapter 11