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File: SM1180_r9eng - December 2007 - Technical note: SM1180 & TM 060
SM
1180 & TM060
File: SM1180_r9eng - December 2007 - Technical note: SM 1180 & TM 060
page 35
of 35
SM1180 & TM060
Conversion Table dBm → W
Typical Input Attenuation using:
Directional Coupler: 60dB
Isolator: 66dB
dBm
-20
-10
0
5
10
10W
100W
1.000W
3.500W 10.000W
40W
400W
4.000W 14.000W 40.000W
Outside Dimensions
(with 66 dB attenuation and max waveguide power 3 kW)
Working modes
Depending on the desired measure, RD8400A may
be configured in three different modes:
1) Pulse Power (jumper between pin #3 and #6 of
D-type connector): the output follows the RF input
signal modulation, up to a maximum frequency of
100kHz.
2) Peak Power (jumper between pin #5 and #6 of
D-type connector): the output reaches the peak
value of the RF modulated input signal.
3) Average Power (jumper between pin #4 and #6
of D-type connector): the output is the mean value
of the modulated input signal.
The graph shows the behaviour of the output signal
in the three different modes.
REM: RD8400 is standard configured in Pulse
Power mode.
“Pulse Power” mode is useful to see the
input signal modulation, if a pulsed power
generator is used.
Use “Peak power” mode to know
the maximum value (peak value) of
microwave power, while “Average
Power” measures the real mean microwave
power.
How to order
RD 8400A1*:
Power Sensor 1 channel
RD 8400A2*:
Power Sensor 2 channels
441384800:
Coax cable l = 600 mm
with SMA-N connector 0°
441384801:
Coax cable l = 500 mm
with SMA-N connector 90°
441384802:
Coax cable l = 500 mm
with SMA-SMA connector 90°
Input Power vs Output Voltage
10
100
1000
10000
100000
-30
-25
-20
-15
-10
-5
0
Input Power dBm
O
u
tp
u
t
V
o
lt
ag
e
m
V