Tektronix RFM150, Instruction Manual

Page: 143 / 278

Performance Check
RFM 150 Instruction Manual 5–5
Minimum loss
matching pad
( 5.7 dB loss)
50
W
coaxial cable
75
W
sensor head
Power meter
RF signal source
with 50
W
output impedance
Figure 5–2: Alternate hookup for 50
W
source output
75
W
coaxial cable
75
W
sensor head
RF signal source
with 75
W
output impedance
Power meter
Figure 5–3: Hookup for 75
W
source output
2. Set up the RF signal source as follows:
H
Frequency: 10 MHz
H
Amplitude: Adjust for –10 dBm (+38.7 dBmV) power meter
reading. (If a matching pad is being used, the output power of
the generator must be increased to compensate for this loss.)
3. Make a copy of Table 5–1 (see page 5–2). Record the power
meter reading in row 5c. of the column labeled “Power Meter
(dBmV).”
If your power meter does not display amplitude in dBmV, add
+48.7 to the reading in dBm to convert to dBmV.
4. Repeat steps 2 and 3 for frequencies of 110, 210, 310, 410, 510,
610, 710, 810, 910 and 1000 MHz.
Performance Check
RFM 150 Instruction Manual 5–5
Minimum loss
matching pad
( 5.7 dB loss)
50
W
coaxial cable
75
W
sensor head
Power meter
RF signal source
with 50
W
output impedance
Figure 5–2: Alternate hookup for 50
W
source output
75
W
coaxial cable
75
W
sensor head
RF signal source
with 75
W
output impedance
Power meter
Figure 5–3: Hookup for 75
W
source output
2. Set up the RF signal source as follows:
H
Frequency: 10 MHz
H
Amplitude: Adjust for –10 dBm (+38.7 dBmV) power meter
reading. (If a matching pad is being used, the output power of
the generator must be increased to compensate for this loss.)
3. Make a copy of Table 5–1 (see page 5–2). Record the power
meter reading in row 5c. of the column labeled “Power Meter
(dBmV).”
If your power meter does not display amplitude in dBmV, add
+48.7 to the reading in dBm to convert to dBmV.
4. Repeat steps 2 and 3 for frequencies of 110, 210, 310, 410, 510,
610, 710, 810, 910 and 1000 MHz.