Project TRXRDN040505

May 5, 2004

Q-band test dewar in Equipment Room for testing with spectrometer.
Using heated load on LNA input.

Setup ACS with two samplers; sampler 1 only valid.  IF into OR1.
Scans 1-4 60second to check setup.

1 : SCAN STARTING AT 53130 17:57:49
4 : SCAN FINISHED AT 53130 18:02:28

Changed T->361 s.

5 : SCAN STARTING AT 53130 18:03:55
6 : SCAN FINISHED AT 53130 18:16:11

TLNA=20.3; Tload=19.2K  Turned load heater on at 18:17.
7 : SCAN STARTING AT 53130 18:21:10
8 : SCAN FINISHED AT 53130 18:33:26

Interruption.  Load heater off.

Changed T -> 121sec.

TLNA=19.9;  Tload=18.8

9 : SCAN STARTING AT 53130 18:52:29
10 : SCAN FINISHED AT 53130 18:56:44

Turned load heater on.  Voltage = 15V.

TLNA=22.9, Tload=33.3.

11 : SCAN STARTING AT 53130 19:00:18
12 : SCAN FINISHED AT 53130 19:04:33

Changed Vheater=10V; Allowed temp to stabilize to 
TLNA=22.3, Tload=26.8.

13 : SCAN STARTING AT 53130 19:07:36
14 : SCAN FINISHED AT 53130 19:11:51

Changed Vheater=5V; Allowed temp to stabilize
Tlna=20.8, Tload=21.4

15 : SCAN STARTING AT 53130 19:15:46
16 : SCAN FINISHED AT 53130 19:20:01

Heater Off.  Allowed temp to stabilize
Tlna=20.2, Tload=19.1

17 : SCAN STARTING AT 53130 19:29:17
18 : SCAN FINISHED AT 53130 19:33:32

During all previous tests this day, LNA Id1=2.4mA.  Changed to 1.2mA
and repeating tests.

Condition:  Load htr off.

19 : SCAN STARTING AT 53130 19:37:05
22 : SCAN FINISHED AT 53130 19:45:46

Vheater -> 15V.  Allowed temps to stabilize.
Tlna=24.0, Tload=33.9.

23 : SCAN STARTING AT 53130 19:50:11
24 : SCAN FINISHED AT 53130 19:54:26

Vheater -> 10V.
Tlna=22.2, Tload=26.7.

25 : SCAN STARTING AT 53130 19:59:14
26 : SCAN FINISHED AT 53130 20:03:29

Vheater -> 5V.
Tlna=21.0, Tload=21.8

27 : SCAN STARTING AT 53130 20:06:43
28 : SCAN FINISHED AT 53130 20:10:58

Heater off.  
Tlna=20.4, Tload=19.4

29 : SCAN STARTING AT 53130 20:13:16
Thru scan 32.