Boonton 4530 Peak Power Meter User Manual User Manual

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4-65

Boonton Electronics

Chapter 4

4530 Series RF Power Meter

Remote Operation

4.8.2 Modulated Mode Example

- Signal in: 100 microsecond wide periodic pulse waveform, modulating a 1

GHz carrier. Peak sensor in use.

NOTE

When the trigger source is set to Bus or to Bus in combination with a signal source, the READ
command cannot be used. If it is, a trigger deadlock error code is generated. READ is a macro
command which is equivalent to the sequence

ABORt;INITiate;FETCh[:]?.

a. Using the GPIB bus trigger to initiate a single averaged measurement:

CALC1:MODE modulated

Set for modulated measurement mode

TRIG:SOURce bus

Set trigger source for bus

ABORT

Measurements STOP and triggers go to idle.

INIT:CONT off

Set for single, triggered measurement

INIT:IMMEDIATE

STOP with blank graph and empty readings

{send GET} or *TRG

One random trace appears in graph mode

FETCH1:ARRAY:CW:POWER?

Returns average, peak and minimum power readings.

{send GET}

No effect; measurement is complete

b. To make successive measurements of average power in the Modulated mode, set

TRIG:SOURce

IMMEDIATE

and

INIT:CONT on

. Then use the FETCH command as above to get readings. The bus trigger is not needed and will

be ignored if sent.

4.8.3 CW Mode Example

- Signal in: 0dBm, 50MHz CW signal from internal calibrator. CW sensor in use.

NOTE

ABORt;INITiate;FETCh[:]?

a. Using the GPIB bus trigger to make single complete measurements.

CALC1:MODE cw

Set for CW measurement mode

TRIG:SOUR bus

Set trigger source for bus

ABORT

Measurements STOP and triggers go to idle.

INIT:CONT off

Set for single, triggered measurement

while { more = 1}

Loop for a series of complete measurements.

INIT:IMMEDIATE

STOP with blank graph and empty readings

{send GET} or *TRG

One random trace appears in graph mode

FETCH1:CW:POWER?

Returns CW power reading. Sending GET again has no effect;
the measurement is complete.

{ end while }