HP 70427A User Manual page 199

Table 8-8
Latc
Bit Bit Weight
h
7 7 128
6 64
5 32
4 16
3 to 8 to 1
0
Advanced Hardware Control
To Select a Multiplexer (Voltmeter Monitor Point)
A8 & A9 YTF & GaAs FET Amplifier Drive
Bit Mnemonic
Unavailable
Unavailable
OUT_LEV_CONTROL
NOISE FILTER
MUX8,4,2,1
8-14 HP 70427A/HP 70428A User's Guide
Bit Description
*Power-on/Reset State
n/a
n/a
*0: GaAs FET amplifiers gate control
1: GaAs FET amplifiers drain control
*0: Adaptive noise filter disabled
1: Adaptive noise filter enabled
*0: 3rd stage amplifier drain current (mA)
1: +10 V reference voltage
2: 2nd stage amplifier gate voltage
3: +10 V power supply voltage
4: 5th stage amplifier drain current (mA)
5: Fine tune DAC voltage
6: 1st stage amplifier drain current (mA)
7: +20 V power supply voltage
8: 4th stage amplifier drain current (mA)
9: Tuning voltage output
10: Level detector voltage
11: YIG current (mA)
12: 6th stage amplifier drain current (mA)
13: Main tune DAC voltage
14: 2nd stage amplifier drain current (mA)
15: YIG heater current (mA)