Giga-tronics 8003, Operation Manual

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8003 Precision Scalar Analyzer
A-4 Manual 20791, Rev. C, June 2001
A.2.2 Directional Bridges
The 80500 CW Directional Bridges are designed specifically for use with Giga-tronics power meters to
measure the Return Loss/SWR of a test device. Each bridge includes an EEPROM which has been
programmed with Identification Data for that bridge.
The Selection Guide in Table A-3 shows primary specifications. Additional specifications are:
Bridge Frequency Response: Return loss measurements using the 8003 can be frequency
compensated using the standard Open/Short supplied with the
bridge.
Insertion Loss: 6.5 dB, nominal, from input port to test port
Directional Bridge Linearity Plus
Zero Set & Noise vs. Input Power:
(50 MHz, 25
°
C
±
5
°
C, 0 dBm Ref.)
+27 dBm (0.5 W)
Weight:
80501: 340 g (12 oz)
80502: 340 g (12 oz)
80503: 198 g (7 oz)
80504: 198 g (7 oz)
Directional Bridge Accessories: An Open/Short is included for establishing the 0 dB return loss
reference during path calibration.
Dimensions: 80501: 76 x 50 x 28 mm (3 x 2 x 1 1/8 in)
80502: 76 x 50 x 28 mm (3 x 2 x 1 1/8 in)
80503: 19 x 38 x 29 mm (3/4 x 1 1/2 x 2 1/8 in)
80504: 19 x 38 x 29 mm (3/4 x 1 1/2 x 2 1/8 in)
Table A-3: Directional Bridge Selection Guide
Bridge Selection Guide
Model
Model Model
Model
Freq. Range/
Power
Range Max.
Max. Max.
Max.
Power
Power Power
Power
Power Linearity
4
(Frequency >8 GHz) Input
Input Input
Input Test
Test Test
Test
Port
Port Port
Port
Direct-
tivity Wgt
Wgt Wgt
Wgt VSWR
VSWR VSWR
VSWR
Precision CW Return Loss Bridges
80501
10 MHz to 18
GHz
-35 to +20 dBm
+27 dBm
(0.5W)
-35 to +10 dBm
±
0.1 dB
+10 to +20 dBm
±
0.1 dB
±
0.005 dB/dB
Type N(f)
50
Ω
Type N(f)
50
Ω
38 dB
0.340 kg
<1.17:0.01 - 8 GHz
<1.27:8 - 18 GHz
80502 APC-7(f)
50
Ω
40 dB <1.13:0.01 - 8 GHz
<1.22:8 - 18 GHz
80503 10 MHz to 26.5
GHz
-35 to +20 dBm SMA(f)
50
Ω
SMA(f)
50
Ω
35 dB <1.22:0.01 - 18 GHz
<1.27:8 - 26.5 GHz
80504 10 MHz to 40
GHz
-35 to +20 dBm Type K(f)
50
Ω
Type K(f)
50
Ω
30 dB 0.198 kg <1.35:0.01 - 26.5 GHz
<1.44:26.5 - 40 GHz
DIRECTIONAL BRIDGE MEASUREMENT ERROR
Power (dBm)
Measurement Error (dB)
.30
.25
.20
.15
.10
.05
0.00
20 15 10 5 -5 -10 -15 -20 -25 -30 -35 -40