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2007 Noise Source, 70MHz

  
Broad band noise goes to precision attenuators controlled by front panel “up” and “down” pushbutton switches via the microprocessor controller. The front panel display shows C/No or attenuation of the noise from a 50 dB- Hz C/No level calibrated for a -20.0 dBm carrier level. Bandpass filters are selected with on board jumpers to band limit the noise at 70 MHz. The 2007 has a front panel red LED that lights if the ambient temperature is outside the +15 to +40 C calibrated temperature range. A yellow LED on the front panel indicates if in remote operation.

 


 2007 Noise Source Front


 2007 Noise Source Block Diagram

Equipment Specifications*
 

Input Characteristics
Impedance/RL
Frequency
Level
Gain		 75 ohms/15dB
70 MHz left
-20dBm
0dB ±0.1dB
Output Characteristics  
Impedance/RL
Frequency Band
Level, w/ 10MHz filter
Level, w/ 40MHz filter
Monitor Level
 		 75 ohms/15dB
52 - 88 MHz
C/No noise pwr range of 50 - 90 dB-Hz w/ -20dBm carrier
C/No noise pwr range of 60 - 90 dB-Hz w/ -20dBm carrier
-10dB down from main output
 
Channel Characteristics  
Selectable BW
Frequency Response
Noise Power Accuracy
Noise Power Stability		 10MHz or 40MHz @ 70MHz
±0.5dB 8MHz, 36MHz
±0.25dB, 15 to 40 deg C; ±0.5dB, 10 to 15, 40 to 50 deg C
±0.5dB, 15 to 40 deg C, 30 days
Controls/Indicators
Test Carrier
Term Noise or Carrier
Output Level
Attenuation
Alarm
Remote
Level		 Toggle switch turns ref 70MHz carrier on/off
Toggle switch terminates noise or external signal
Potentiometer for Noise calibration
PB switches w/ readout of attenuator or C/No setting
Red LED for temp range (w/ FET open drain)
Yellow LED lights when remote control is selected
3 digit displays show C/No for a -20dBm carrier or att from max level
Other
RF, IF Connectors
Size, Bench Top
Size, Rack Mount (-R)
Power
 		 BNC, female
4.7"W X 1.75"H X 12.5"D
19 inch standard chassis, 1.75"H X 13.0"D (optional)
120 ± 10% VAC, 60Hz, 20W max, wall mount power supply (optional)

*+10 to +40 degrees C; Specifications subject to change without notice