Industrial Meters

It is a high gain, voltage amplifier tuned at the center frequency of 1 KHz It is used for VSWR, attenuation and total mismatch on the line

Specifications:

Model : VSWR-115

• Sensitivity: 0
2ƒÊVat a 200 ohm input impedance for full scale deflection

• Noise level: At least 5 dB below full scale at rated sensitivity and maximum bandwidth with input terminated in 100 ohm and 500 ohm for crystal low and high impedances respectively


• Calibration: Square law, meter indicates SWR in dB
  
• Range: 70 dB, input attenuator provides 60 dB in 10 dB steps, accuracy ± 0
2dB per 10 dB stepsMaximum cumulative error ± 05 dB

• Scale selector: Normal, Expand & -5dB
  
• Meter Scale: SWR1-4, SWR3-10, Expand1-1
3, dB0-10, expand dB0-2

• Gain control: Adjust the reference level, variable range 0-10dB approx


• Input: "Bolo" bias provided for 4
3mA low current bolo meters "Crystal" 200 ohms for low impedance crystal rectifier and 200K ohms high impedance

• Crystal: Rectifier as null detector


• Recorder: Socket provided for
  
• Recording: Having 1 V for full scale deflection, internal resistance of 1000 ohms or less


• A/C Output: BNC connector for amplified output


• Input Connector: BNC(F)
  
• Frequency: 1000Hz ± 10%
  
• Power: 230 volts A
C ± 10%, 50Hz mains supply

Scientific microwave offers frequency meters such as: Direct Reading Frequency Meter (DRF) It is constructed from a cylindrical cavity resonator with a variable short circuit termination. The shorting plunger is used to change the resonance frequency of the cavity by changing the cavity length. DRF measures the frequency directly. It is particularly useful when measuring frequency differences of small changes Specification

Model	Band	Freq. Range (GHz)	Waveguide	Calibration	VSWR
XFM-139	X	8.20-12.40	WR-90	+/-2	1.02
KuFM-139	Ku	12.40-18.00	WR-62	+/-2	1.02
KFM-139	K	18.00-26.50	WR-42	+/-2	1.02

These frequency meters are intended for moderate accuracy application in microwave measurements and are usually best for this purpose. These permit full power flow down the transmission line except at the tuned frequency. It consists of a cavity, plunger and the section of standard waveguide. The plunger ensures precise control of its position enabling frequency measurement with high accuracy.

Specification

Model	Band	Freq. Range (GHz)	Waveguide	Calibration Increment (MHz)	VSWR
SFM-125	S	2.60-3.95	WR-284	10	1.03
CFM-125	C	3.95-5.85	WR-229	10	1.03
JFM-125	J	5.85-8.20	WR-137	10	1.03
XFM-125	X	8.20-12.40	WR-90	10	1.03
KuFM-125	Ku	12.40-18.00	WR-62	10	1.03
KFM-125	K	18.00-26.50	WR-42	10	1.03