Input 1 Sensitivity Test; Figure 6-1, Input 1 Low Frequency Sensitivity Test Configuration; Table 6-1, Input 1 Sensitivity Low Frequency Test - Racal Instruments 2461 User Manual

Input 1 Sensitivity
Test
SIGNAL GENERATOR
AF OUT

Figure 6-1, Input 1 Low Frequency Sensitivity Test Configuration

Performance Verification and Adjustments 6-2
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Set the UCT to its default state. Select 50Ω input impedance for
input 1, and select external frequency standard.
Equipment: Signal Generator
Configure UCT as follows:
*RST
INP1:IMP 50
selects external frequency
If the UCT is fitted with a TCXO or OCXO oscillator option,
connect the UCT internal reference output to the external signal
source 10MHz Input. Configure the external signal source to
accept the 10MHz reference from the UCT.
Connect the Function Generator to the UCT as shown in Figure
6-1.
10MHz OUT
Apply the frequencies, amplitudes and resolution settings given
in the following table to the UCT. Check that the UCT gives a
stable reading within the tolerances given, at less than the
signal levels given (example: a stable reading at 20mV instead
Command Syntax:
MEAS1:FREQ?

Table 6-1, Input 1 Sensitivity Low Frequency Test

2461Type C User Manual
returns unit to default state
selects 50Ω impedance
standard
IN
INPUT 1
1
GATE
VT1
VT2
ARM
IN
EXTERNAL STANDARD INPUT
IN 3
STD
OUT
T2
IN
2
OSC
UCT
of the listed 25mV).
takes a frequency measurement
Racal Instruments  1998