12-9
Module I/O Specifications
A4 Modulation Distribution
Outputs
The output of AUDIO_OUT_HI can be set on the RF Analyzer page.
To route the input signal AFG1 to the output AM_MOD, access the SERVICE Screen.
Select the latch ’dstr_mod_destination’ and change the value to any odd number (for
example ’3’). Select ’dstr_afg1_to_mod’ and change the value to any even number (for
example ’2’) and measure.
MOD_MON can also be accessed using the SERVICE Screen. Use latch
’dstr_monitor_select’.
’2’ signal at un-attenuated values of AFG1.
’3’ use external source connected to ’Modulation_In_AmSpeech’
’4’ signal at levels set up at RF Generator page.
To Front Panel BNC
AUDIO_OUT_HI J1(7)
Output Z < 1 Ω
Maximum Output Voltage 5 Vrms OpenCircuit
Max Output Current 40 mA Peak Hardware spec.
20 mA peak Spur Requirements
Full Scale Gain (Uncal) 5.953± 1.51% LFS1/2 to FP, DAC=255, 600Ω Load.
Attenuator Accuracy ±.02 dB (DC) (20,40,60 dB)
AM_MOD J1(20)
AM MOD Ouptut Z < 400ΩLoad 100 kΩ/4000 pF
Full Scale output 4 Vp
Uncalibrated Path Gain 2.37 ± 1.5% DAC=255, 1 kHz Gain (AFG1 Path)
Gain (F.P. Input) 5.12± 2.5% DAC=255 , 1 kHz
Attenuator Accuracy ± 0.02 dB ( 1 kHz) (20 dB)
High Freq roll off < 3 dB 150 kHz
Low Freq roll off < 1 dB 20 Hz AM port EXT AC Standard AM load.
MOD_MON J1(18)
Output Z < 1 kΩ