Various RF Power Levels vs Voltage and Settings

This is simply a loose fitting chart that documents various repeaters analog RF output levels.  It will be expanded as more testing is done and ultimately will include mobiles and Ht's if readers bother to send in their results.

Initial measurements for this page were desired as a repeater was to be run in a vehicle environment and efficiencies at battery charging voltages and battery idle needed to be determined.

If you would like to contribute your measurements, just send them to dci@trbo.org

XPR-8300 UHF 1-25 Watt  (M27QNR9JA7AN)

 

Input Voltage Current CPS RF Setting Actual RF Power consumed Efficiency
Amp/Watt
Eff a/w
less 1.1amp
Overall Tx Efficiency
13.8 VDC 1.1  ----------

Rx Idling

15.2 Watts --- --- ---
  2.2  1 Watt  1.0 Watts 30.4 Watts 2.2 1.1 %
  3.1  5 Watts  4.0 Watts 42.8 Watts .78 .50  
  3.8  10 Watts  6.8 Watts 52.4 Watts .56 .40  
  4.4  15 Watts 10.0 Watts 60.7 Watts .44 .33  
  4.9  20 Watts 13.2 Watts 67.6 Watts .37 .29  
  5.5  25 Watts 17.1 Watts 75.9 Watts .32 .26  
  6.0  30 Watts 21.0 Watts   .29 .23  
12.1 VDC 2.8   5 Watts  2.5 Watts   1.12 1.08  
  4.1 15 Watts  8.0 Watts   .51 .38  
  5.1 25 Watts 13.0 Watts   .39 .31  
  5.5 30 Watts 16.0 Watts   .34 .28 %
120VAC .22  -----------

Rx Idling

 24 Watts --- --- ---
120VAC .42  1 Watts  0.8 Watts  48 Watts .53   04.2%
120VAC .53  5 Watts  3.8 Watts  62 Watts .14   10.0%
120VAC .63  10 Watts  7 Watts  74 Watts .09   14.0%
120VAC .71  15 Watts 10 Watts  85 Watts .07   16.7%
120VAC .78  20 Watts 13.5 Watts  93 Watts .06   19.6%
120VAC .86  25 Watts 17.2 Watts 103 Watts .05   21.8%
120VAC .92  30 Watts 20 Watts 111 Watts .046   23.0%

NOTES:
1)  All reading taken with Digital Volt and Ammeter to the closest .1 Volt and .1 Amp.
2)  All RF output readings measure by a Bird 43 to the closest .1 Watt (out of the repeater)
3)  "Eff a/w less 1.1" is the Amp per Watt ratio minus the 1.1 amp overhead for the receiver, controller and LEDs.

Contact DCI

Revised: 09/18/2014 21:58

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