Filed Strength Mode Setting - Deepace KC901V Manual

If you are used to enter the frequency with start/stop frequency, you can set the
frequency control item as "START/STOP" in FUNC menu.
press the AMP button and turn the wheel / press the "+" or "-" button to set the
REF Level and moving the curve up and down.
While testing VSWR, button AMP is for adjusting the amplitude display division.
Pressing it repeatedly can switch the range among large, middle and small.
Sweeping point's setting is in FUNC menu, shown as SWEEP POINT. Keep it as
450 points in most situation and it's not necessary to change it in usual cases. Instru-
ment will choose the suitable frequency step (STEP) automatically according to the
sweeping width.
Sweeping speed can be set in FUNC menu with 3 levels: fast, middle and slow.
Usually middle speed will be the choice. Using fast can shorten the sweep time, but
loosing accuracy. In this case, there will be a "*" shown on top right corner of the
screen to notify user that the test is not accurate.
Resolution bandwidth of S11 and S21 need to be set in FUNC menu. The small-
er RBW is, the slower the instrument's scans. Factory calibration is done under RBW
10KHz. So set RBW as 10KHz if there are no other special reasons.
In the menu of S21, item (dB/div) can be used for switching the range of ordi-
nate.
2.8 Field Strength Mode Settings
Field strength mode is measuring the level of input port. Field strength's value is
from the calculation of input level and antenna's coefficient. Antenna's coefficient is
mainly related with antenna's gain and frequency. So make sure that the instrument
gets the antenna's gain if you want to get the accurate field strength.
After enter field strength mode (FIELD), there is an item (ANT GAIN) in the menu.
After pressing it, choose the sign with "+/-" in the menu, then enter the antenna's
gain on the number keyboard.
Update speed of the number display can be set in 3 levels: FAST, MIDDLE and
SLOW. MIDDLE is recommended. Update speed of the S-meter won't be influenced by
this setting. It's for observing the transient strength change of signal strength.
Attention
KC901V is a network analyzer, so there is no protection for local oscillation's leak.
If used for observing the spectrum or field strength, there must be local oscillation
signal flow into the receiving antenna and its strength degree can reach -30dBm. Its
frequency is at 109.65MHz plus or minus the receiving frequency. User should esti-
mate the consequences and if needed, avoid the interfering frequency points by set-
ting local oscillation as well as adding a band-pass filter.
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