Two-port measurements with the tracking generator
R&S FSH
1145.5973.12 4.84
E-14
Tracking generator
mode
Softkeys for
transmission &
reflection calibration
Softkey for switching
between scalar/vector
meas., opt. R&S FSH-K2
0 dB reference
Softkey labeling for
tracking generator
Only models
1145.5850.23
1145.5850.26 (Ser. No.
100500 or later)
When the tracking generator is switched on, the status display indicates Uncal. This indicates that
tracking generator measurements are uncalibrated. The level axis is in the relative unit dB. Apart from
the level values, the 0 dB reference is also displayed. This corresponds to a reference level of -20 dBm
in the spectrum analyzer mode (= nominal output level of the tracking generator with model
1145.5850.13). If an output level of 0 dBm is used with other models, the 0 dB reference corresponds to
a reference level of 0 dBm.
When the tracking generator is on, measurement parameters like bandwidth or the frequency range are
selected with the appropriate keys as in the spectrum analyzer mode. When the MEAS key is pressed,
the softkey menu for the tracking generator is displayed.
Before calibration, the output level of the tracking generator, the frequency range you want and the
appropriate reference level should be set because calibration is only valid for the calibrated frequency
range and reference. Changing these parameters after calibration invalidates calibration.
Note:
The calibration remains valid if the start frequency, stop frequency, center frequency and span
are subsequently changed within the calibrated frequency range. In this case, the R&S FSH
interpolates the correction data between the reference points of the calibration. The R&S FSH retains
the calibration values but displays a red dot before the tracking generator status display in the upper
right-hand corner of the screen to indicate a possible increase in measurement uncertainty.
When you press the MEAS key twice, the R&S FSH again opens the menu for selecting the various
measurements.
Setting the output level:
(model 1145.5850.23 only up to serial number 102314)
Press the TG ATT softkey in the TRACKING GEN
menu.
The submenu for selecting the output level will open.
The output level is set by selecting an attenuation
value (0 dB or 20 dB). If you select 0 dB, the output
level will be 0 dBm. If you select 20 dB, the output level
will be –20 dBm.
Using the rotary knob or the cursor keys, place the
red cursor on the attenuation value you want.
深圳市盛腾仪器仪表有限公司
Tel:0755-83589391
Fax:0755-83539691
Website: www.Sengt.com