Chapter 4
Using Spectrum Analyzer
JD700B Series User’s Guide
75
NOTE
This setting option is not available in the Field Strength mode, the AM/FM Audio
Demodulation mode, and the Route Map mode.
Gated sweep
You can configure the gated sweep settings with an internal or external trigger source. If you select
Gated
Sweep Settings
, you can view the signal in time domain.
Procedure
1
Press the
SWEEP
hot key.
2
Press the
Gated Sweep Settings
soft key.
3
Optional
. Adjust sweep time to allow enough time for a cycle by completing the following steps:
Press the
Zero Span Time
soft key.
Enter a value by using the numeric keys.
Select the unit:
Sec
,
mSec
, or
µSec
.
4
Set the period, if using the internal trigger source, by completing one of the followings:
To select the preset period, complete the following steps:
Toggle the
Period
soft key to
StdSignal
.
Press the
StdSignal
soft key, and then select the period from the choices:
GSM (4.615 ms)
,
WCDMA (10 ms)
,
LTE (10 ms)
,
EV-DO (5 ms)
,
TD-SCDMA (5 ms)
,
or
WiMAX (10 ms)
.
To manually set the period, complete the following steps:
Toggle the
Period
soft key to
Manual
.
Press the
Period
soft key to enter the amount of time.
Enter a value by using the numeric keys.
Select the unit:
Sec
,
mSec
, or
µSec
.
5
Press the
TRIGGER
hot key, and then complete one of the followings:
Select
External
for an external trigger source.
Select
Video
or
Display
Position
for the internal trigger source.
6
Press the
PREV
hard key to continue setting the gated sweep.
7
Set the gate delay by completing the following steps:
Press the
Gate Delay
soft key.
Enter a value by using the numeric keys.
Select the unit:
Sec
,
mSec
, or
µSec
.
8
Set the gate length by completing the following steps:
Press the
Gate Length
soft key.
Enter a value by using the numeric keys.
Select the unit:
Sec
,
mSec
, or
µSec
.
9
Press the
PREV
hard key to enable gated sweeping.
10
Toggle the
Gated Sweep
soft key to
On
.
NOTE
This setting option is not available in the in the Spurious Emissions mode, the Field
Strength mode, and the Route Map mode.
Using signal generator (RF source)
You can turn on the RF Source feature to generate a CW signal of different output power levels. Note that
this is not supported when the 28 GHz downconverter is in operation.