¸FSH3 ¸FSH6
Directional Power Sensor ¸FSH-Z44
Frequency range 200 MHz to 4 GHz
Power measurement range 30 mW to 120 W (300 W with unmodulated envelope)
VSWR referenced to 50 W 
  200 MHz to 3 GHz
  3 GHz to 4 GHz
<1.07
<1.12
Power-handling capacity depending on temperature 
and matching  
(see diagram below)
120 W to 1000 W
Insertion loss 
  200 MHz to 1.5 GHz
  1.5 GHz to 4 GHz
 
<0.06 dB
<0.09 dB
Directivity 
  200 MHz to 3 GHz
  3 GHz to 4 GHz
 
>30 dB
>26 dB
Signal weighting average power
Measurement uncertainty 
 
 
  200 MHz to 300 MHz
  300 MHz to 4 GHz
sine signals,  
+18 °C to +28 °C, 
 
no zero offset
 
 
 
4 % of measured value (0.17 dB)
 
3.2 % of measured value (0.14 dB)
Zero offset  after zeroing ±4 mW
Range of typical measurement error with 
modulation 
  FM, PM, FSK, GMSK
  AM (80 %)
  cdmaOne, DAB
  3GPP WCDMA, CDMA2000®
  DVB-T
  π/4-DQPSK
if standard is selected 
on ¸FSH
 
 
0 % of measured value (0 dB)
±3 % of measured value (±0.13 dB)
±1 % of measured value (±0.04 dB)
±2 % of measured value (±0.09 dB)
±2 % of measured value (±0.09 dB)
±2 % of measured value (±0.09 dB
Temperature coefficient 
  200 MHz to 300 MHz
  300 MHz to 4 GHz
 
0.40 %/K (0.017 dB/K)
0.25 %/K (0.011 dB/K)
Peak envelope power
Power measurement range
  DAB, DVB-T, cdmaOne,
  CDMA2000®, 3GPP WCDMA   
Video bandwidth 
  4 kHz
  200 kHz
  4 MHz
4 W to 300 W
0.4 W to 300 W
1 W to 300 W
2 W to 300 W
Measurement uncertainty +18 °C to +28 °C same as for average power plus effect of peak hold circuit
Accuracy of peak hold circuit for burst 
signals
  Duty cycle 
≥ 0.1 and 
  repetition rate 
≥ 100/s 
  20/s 
≤ repetition rate < 100/s
  0.001 
≤ duty cycle < 0.1
  Burst width 
≥ 0.5 µs
  Burst width 
≥ 0.2 µs 
video bandwidth
  4 kHz
  200 kHz
  4 MHz
±(3 % of measured value + 0.05 W) at burst width ≥100 µs 
±(3 % of measured value + 0.20 W) at burst width ≥4 µs 
±(7 % of measured value + 0.40 W) at burst width ≥1 µs
±(1.6 % of measured value + 0.15 W)
±0.10 W
±5 % of measured value
±10 % of measured value
Range of typical measurement error of peak 
hold circuit for cdmaOne, DAB 
DVB-T, CDMA2000®, 3GPP WCDMA
video bandwidth 4 MHz
and standard selected on 
the ¸FSH 
±(5 % of measured value + 0.4 W) 
±(15 % of measured value + 0.4 W)
Temperature coefficient
  200 MHz to 300 MHz 
  300 MHz to 4 GHz
0.50 %/K (0.022 dB/K)
0.35 %/K (0.015 dB/K)
Handheld Spectrum Analyzer ¸FSH16