PRAXSYM PAMS User Manual Download Page 10

Page 9 

Initializing Shield Level Measurements 

In Shield Level mode the signal level measured by the receiver must 

be initialized to the test signal from the transmitter to indicated 0 dB 

shield level when the enclosure is open.  This initialization process is 
completed by depressing the CAL button.  Details of the initialization 

process are detailed in the “Making Shield Level measurements” 

section of the manual, section 3.3.   
 

Backlight 

Depress the LIGHT button on the top of the receiver to toggle the 

LCD backlight on/off.  Although the screen will have lower visibility, 

by turning the backlight off the battery life will be increased by 
approximately 10%. 

 

Control Lock 

Once set, the controls of the receiver can be locked to prevent 
inadvertently changing a setting that could result in measurement 

errors.  Depress the LOCK button on the top of the receiver to toggle 

the lock feature on/off.  

 

 

3.2 Transmitter 

The transmitter is a continuous wave signal source with adjustable 
output transmit level over it’s frequency range.   

 
Initial Set-Up and Power On 



Attach one of the antennas to the BNC connector located on the 
top face of the transmitter. 



Power On / rotate POWER switch to ON position. 



Allow a 5 minute warm-up period before making measurements. 

 
  

 

 
 

 

Summary of Contents for PAMS

Page 1: ...User s Manual The solution for making easy shielding effectiveness measurements PAMS Portable Attenuation Measurement System 310 010042 001...

Page 2: ...cts in material and workmanship under use as specified in this guide for a period of one year from date of delivery PRAXSYM further agrees to repair or replace at its discretion any failure which upon...

Page 3: ...readout display the shielding level dB Separately the transmitter and receiver will also work well in custom applications The transmitter provides a portable and semi rugged CW transmitter with adjus...

Page 4: ...e at Power Jack DC 15 1 0 V 2A Battery Operation 4 hours operation 70 minutes charge Controls OFF VOL MODE CAL FREQUENCY SELECT T HOLD UP DOWN LOCK BACK LIGHT Indicators MODE CAL STATUS SIGNAL LEVEL F...

Page 5: ...o 60 dBm 1 2 or 5 dB steps Frequency Stability 2 5 ppm Charge Voltage at Power Jack DC 15 1 0 V 2A Battery Operation 2 hours operation 70 minutes charge Controls OFF ON MODE ATTEN FREQUENCY SELECT BAC...

Page 6: ...may self discharge to less than 3 Volts after a period of storage or if the unit is left on for several days During a new charge cycle it will first enter a pre charge trickle state before beginning t...

Page 7: ...ood practice to disconnect the batteries to ensure long battery life With the batteries disconnected they can be stored charged or discharged To disconnect the batteries unplug the 2 pin connector usi...

Page 8: ...used to measure the signal level of a continuous wave signal The receiver has a narrow 7 5 kHz IF bandwidth enabling it to measure a test signal in the presence of interfering signals in the same band...

Page 9: ...eps Depress the F DIGIT switch to toggle the step size between 1 MHz and 100 kHz The current step size is displayed on the FR ADJ line of the display The frequency can be set in either Signal Strength...

Page 10: ...Although the screen will have lower visibility by turning the backlight off the battery life will be increased by approximately 10 Control Lock Once set the controls of the receiver can be locked to...

Page 11: ...de the output level of the CW signal can be changed using the frequency control knob Depressing the mode button a second time places the transmitter in broadband mode See Section 3 4 for a description...

Page 12: ...test frequency to ensure no interfering signal is present on your test frequency When making measurements in an unfamiliar area set the receiver to Spectrum Monitor mode to determine frequencies in t...

Page 13: ...receiver will flash INITIALIZE PRESS CAL on the display Ensure that there are no obstructions between the transmitter and receiver and then depress the CAL button on the Receiver The display should i...

Page 14: ...he enclosure open measure the level of the pickets with a spectrum analyzer Shield level can be determined by calculating the drop in picket level after the enclosure door is closed 3 5 Monitor Mode O...

Page 15: ...er On Rotate POWER switch to the ON position Depress the mode button until the LCD mode line reads monitor NOTE The INITIALIZE PRESS CAL warning will flash until a system level calibration is performe...

Page 16: ...15 SHIELDED ROOM Close Door Begin Test in MONITOR mode Set the switch matrix to select ANT 1 Read and manually record the MONIT LEVEL dB Repeat the above sequence for antennas 2 12 12 Position RF Swi...

Page 17: ...the threshold a variable tone is emitted Low frequency tones correspond to low poor shielding levels while high frequency tones signify high better shielding levels If the shielding level exceeds the...

Page 18: ...Page 17 Notes...

Page 19: ...Notes Page 18 P R A X S Y M...

Page 20: ...900 000001 001 Rev G P R A X S Y M...

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