Agilent Technologies 8564EC Service Manual page 490

Table 12-6 on page 629
Figure 12-11 on page 631
Table 12-6 RF Section Mnemonic Table
Mnemonic
TUNE+, TUNE−
HTR+, HTR−
MAIN COIL+, MAIN COIL−
FM+, FM−
LO SENSE
LEVEL ADJUST
GATE BIAS
HEXTMIXB
HSIGIDOFFA
PIN SW
PIN DIODE SWITCH
MIXER BIAS
RFGAIN
RFGAIN1 and RFGAIN2
L10dB ON, L20dB ON, L30dB ON
L10dB OFF, L20dB OFF, L30dB OFF
Chapter 12
lists the RF Section mnemonics shown in
and provides a brief description of each.
YTF Tune Signal (SBTX or RYTHM)
YTF Heater Power
YTO Main Coil Tune Signal
YTO FM Coil Tune Signal
LO Amplitude Sense Voltage
LO Amplitude Adjustment Voltage (PIN
ATTEN)
LOMA Gate Bias Voltage
External Mixer:
SIG ID Oscillator
ON:
PIN Diode Switch Control (SBTX or
RYTHM LO Band/HI Band)
PIN Diode Switch Control For 2ND Conv. IF
Output
Detected Voltage on 2ND Converter Mixer
Diode
Voltage to Control Gain of Flatness Comp.
Amps.
Currents to Drive PIN Diodes in Flatness
Comp. Amps.
Control Lines to Set Attenuator Sections 10,
20, and 30 to Attenuate Position (Active
Low)
Control Lines to Set Attenuator Sections 10.
20, and 30 to Bypass Position (Active Low)
RF Section
A15 RF Assembly
Description
+12V=EXT MIX
−12V=INT MIX
+12V=SIG ID OFF
−8V=SIG ID ON
629