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Model 5344S
Operation and Programming
Example:
Start Frequency (FI) of 2 GHz and a Stop Frequency (F2) of 4 GHz with a Sweep Time of 100 ms.
1.
Set MANUAL LOCK and AUTO LOCK off (lamp off.) If AUTO LOCK is turned on, the 5344A will
display error code Err 10.
2.
Select Start/Stop mode on the 8350A. If the plug-in has a CW filter, turn it OFF.
3.
Using the 8350A DATA ENTRY keys, press:
START
and then,
2
GHz
STOP
and then,
4
GHz
SWEEP TIME
and then,
1
0
0
ms
EXT trigger; if the SWEEP TRIGGER is connected to the 8350A EXT TRIG.
INT or LINE trigger if the SWEEP TRIG is connected to the 8350A STOP SWEEP.
The 8350A should display 2.000 GHz on the START display, 4.000 GHz on the STOP
display, and
0.100 SEC on the Frequency/Time display.
4.
Using the 5344A Function keys, press:
a.
MODE until the LK/R annunciator lights. The MODE key will scroll through the four
modes of operation. If you pass LK/R, continue pressing MODE until you return to LK/R.
5.
Using the 5344A Numeric Entry keys, press:
the 5344A should display:
2.000000000 GHz
The 5344S always assumes that the remaining unentered digits are zero. Thus, 1 Hz resolution
always occurs.
6.
Press the 5344A MANUAL LOCK key.
The LOCKED annunciator should light.
7.
If the FREQ LO annunciator lights, manually raise the frequency of the 8350A until the 5342A
displays 2 GHz (±25 MHz). The 5344S will automatically tune the 8350A to the desired frequency.
8.
If the FREQ HI annunciator lights, manually lower the frequency of the 8350A until the 5342A
displays 2 GHz (±25 MHz). The 5344S will automatically tune the 8350A to the desired frequency.
9.
Notice that when either the FREQ HI or FREQ LO annunciators are on indicating that tuning is
required, the resolution on the counter decreases to 1 kHz. This allows a very fast update of the
counter display making tuning quicker and easier. The sweep is also halted until Lock is achieved.
NOTE
In Lock/Roll, the signal source is locked only (briefly) at the start of each
sweep. It is possible for the sweep settings to be changed during the
unlocked portion of the sweep such that the starting frequency is changed
by some near multiple of the current local oscillator frequency of the
counter. This will result in lock being regained at the end of the current
sweep, even though the frequency is nowhere near that desired. To avoid
this situation, do not change any settings during a sweep. If you do get into
this situation, press RESET to restart the locking algorithm.
Figure 3-11. Lock and Roll in Manual (Continued)
3-38
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