Using the Differential (small signal) Outputs
These examples show you how to use the amplifier’s different ia l (small
signal) outputs. Note the following when using the outputs:
•the differential (small signal) outputs are de signed for
high-frequency and low-power source applications.
•with no attenuation, the maximum input volt a ge (su m of In put1 and
Input2) must not exceed 2 Vpp (Figure 2-1).
In the first example, the E1446A is a servant to th e E1445A. In the second
example, the E1446A is a servant to the E1405 Command Module.
Using the

Differential Outputs

(Agilent E1445A
Commander)
Rather than amplify the input signal, this progra m attenuates the signal
supplied by the E1445A to obtain an output amplitude of 10 mVpp. The
output can be taken at either the ’Diff +’ or ’Diff -’ (inverted) output.
The steps of this program are:
1. Reset the E1445A AFG and E1446A amplifier.
*RST
2. Set the AFG frequency, function, and (minimum) amplitude.
[SOURce:]FREQuency[1][:CW|:FIXed] <frequency>
[SOURce:]FUNCtion[:SHAPe] <shape>
[SOURce:]VOLTage[:LEVel][:IMMediate][:AMPLitude]
<amplitude>
3. Couple the AFG output load value to the output impedance value.
OUTPut[1]:LOAD:AUTO <mode>
OUTPut[1]:IMPedance <impedance>
4. Set the amplifier input impedance to match the AFG output l oa d.
INPut[1]:IMPedance <impedance>
5. Set the amplifier input attenua t io n .
INPut[1]:ATTenuation <attenuation>

2-26 Programming the Agilent E1446A Using the Differential (small signal) Outputs