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DG-503

Nissei DG-503 User manual

  • Hello! I've reviewed the instruction manual for the NISSEI SWR & Watt Meter models DG-503 and DG-503MAX. This manual provides details on using the device to measure forward and reflected power, as well as VSWR for analog and digital transceivers. I'm ready to assist with any questions you might have about these devices, including its measurement modes, specifications, and features such as the large LCD display and selectable modes.
  • What measurement modes are available for the DG-503?
    What measurement modes are available for the DG-503MAX?
    What is the minimum power required for SWR measurement?
    What is the input/output impedance?
    What is included in the box?
INTRODUCTION
This SWR & Watt meter is highly accurate for measuring Forward Power,
Reflected Power, and the VSWR of Analog and Digital transceivers
MAIN FEATURE
1. Large LCD (3.5") display for easy of reading.
2. Forward / Reflected power / VSWR ratio in one push button
3. Selectable to measure DMR (TDMA), AM, SSB (DG-503MAX)
4. LCD backlight display
5. Convenient control layout for easy operation
6. Packing gift box and DC 12V wire.
SPECIFICATIONS
MODEL DG-503 DG-503MAX
Frequency Range
Measurement (Analog mode)
Measurement (MAX mode) Not available DMR (TDMA), AM, SSB
Calibration point
Power Range
Accuracy
Minimum Power for SWR
Input/Output Connector
Weight (Net)
Insertion Loss
Testing Function
Input/Output Impedance
Dimension (W/H/D) mm
Accessories
<FRONT PANEL>
1 4 <FRONT & REAR PANEL>
1. LCD Display : Indicates FWD/REF and VSWR
2. HF & V/UHF band switch
3. Power switch
4. MAX : Measuring DMR (TDMA) / AM / SSB
3 (DG-503MAX only : when rear switch in MAX mode)
NOTE: When measuring TDMA or other digital modes the
display may blink due to the nature of the transmission
this is not a fault of the design and is normal operation
<REAR PANEL>
<REAR PANEL>
5&8.TX : Coax connector to transmitter RF output
6&9. ANT : Coax connector to antenna system
7. Power source :12V DC wire
[ Black is negative (-), black/white is positive (+) ]
10. MAX switch : Selectable DMR (TDMA), AM, SSB
Push to right 'white dot' is MAX mode (DG-503MAX only)
Made in Taiwan
50 Ohm
140 x 84 x 122
Operation Manual, 12V DC Wire
Digital SWR / Watt Meter
Model: DG-503 & DG-503MAX Instruction manual
(+/- 5%)
1W
SO239 (N-female option)
750 g
Less than 0.1 dB
Fwd/Ref Power & VSWR ratio
1.6-60 MHz/125-525 MHz
CW, FM, FDMA
28 / 145 / 435 MHz
0 - 200W
2
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