HP 70427A User Manual page 193

Advanced Hardware Control
To Select a Multiplexer (Voltmeter Monitor Point)
Table 8-2 A4 IF Amplifier
Latc
Bit Bit Weight
h
3 8
2 4
1 2
0 1
2 7 128
6 64
5 32
4 16
3 8
2 4
1 2
0 1
3 0 1
4 11 4095
to to
0 0
8-8 HP 70427A/HP 70428A User's Guide
Bit Description
Bit Mnemonic
*Power-on/Reset State
NOISE_R
disable :
11848A enable
ST4_R
ST3_R
ST2_R
Unused
Unused
ST1_R
Unused
STAGE_3
STAGE_4
STAGE_1
STAGE_2
OVERLOAD_INPT
mm Mixer Bias
DAC
*0: Rear panel in from HP 11848A
1:Rear panel in from HP
0: Stage 4 amplifier +10 dB gain
1: Stage 4 amplifier bypassed
0: Stage 4 amplifier +10 dB gain
*1: Stage 3amplifier bypassed
0: Stage 3 amplifier +10 dB gain
*1: Stage 2 amplifier bypassed
n/a
n/a
0: Stage 1 amplifier +10 dB gain
* 1:Stage 2 amplifier bypassed
n/a
* 0: Stage 3 amplifier off
1: Stage 3 amplifier on
* 0: Stage 4 amplifier off
1: Stage 4 amplifier on
*0: Stage 1 amplifier off
1: Stage 1 amplifier on
*0: Stage 2 amplifier off
0: Stage 2 amplifier on
No functionality
40000= 10.2 mA
*2000= 0 mA
0= +10.2 mA