Advertisement
Section I
Model415E
Figure 1-1 and Table 1-1
Figure 1-1.
Model 415E SWR Meter
Table 1-1.
Specifications
Sensitivity: 0.15 pv rms at maximum bandwidth
(1 pv rms on high impedance crystal input).
Noise: At least 7.5 db below full scale at rated sen¬
sitivity and maximum bandwidth with input termi¬
nated in optimum source impedance (see Input).
Noise figure less than 4 db.
Range: 70 db in 10 and 2 db steps.
Accuracy: ±0.05 db/10 db step; maximum cumula¬
tive error between any two 10-db steps, ±0.10 db;
maximum cumulative error between any two 2-db
steps, ±0.05 db.
Linearity:
±0.02 db on expand
scales, determined by inherent meter resolution on
normal scales.
Input: Unbiased low and high impedance crystal (100
and 5000 ohm optimum source impedance respec¬
tively); biased crystal (1 v into IK); low and high
current bolometer (4.5 and 8.7 ma ±3% into 200 ohms),
positive bolometer protection. Input connector, BNC
female.
Input Frequency: 1000 cps, adjustable 7%.
Other
frequencies between 400 and 2500 cps available on
special order.
Bandwidth: Variable, 15 to 130 cps.
Typically less
than 0. 5 db change in gain from minimum to maxi¬
mum bandwidth.
Recorder Output: 0 to IV, 1000 ohms source imped¬
ance, BNC female.
Amplifier Output: 0to0.3Vrms (NORM), 0to0,8rms
(EXPAND) into at least 1 OK ohms, dual banana jacks.
Meter Scales: Calibrated for square-law detectors.
SWR: 1 to 4, 3.2 to 10 (NORM); 1 to 1.24 (EXPAND).
DB: 0 to 10 (NORM); 0 to 2.0 (EXPAND). Battery:
charge state.
Meter Movement: 0.25% movement, taut-band sus¬
pension, mirror-backed scale with expanded db and
swr scales greater than 4-1/4 in. (108 mm) long.
Power: 115 or 230 volts ±10%, 50to 400cps, 2watts.
Power line frequency or multiples thereof must not
be at the tuned amplifier frequency. Optional re¬
chargeable battery provides up to 36 hours contin¬
uous operation.
Dimensions: 7-25/32 in. wide, 6-3/32 in. high, llin.
deep from front side rail (190 x 155 x 279 mm).
Weight: Net 7-7/8 lb (3, 5 kg), 9-7/8 lb (4, 4 kg) with
battery.
Options:
01.
Rechargeable battery installed.
02.
Rear-panel input connector in parallel with the
front-panel connector.
1-0
02152-2
Advertisement
