Difference: PowerMeasurements800conv (1 vs. 2)

Revision 214 Dec 2005 - Main.MichaelGoger

META TOPICPARENT	name="NmrStaffnotes"

Contents

Power Measurements for 800conv
- Low Power
- High Power

Power Measurements for 800conv

Low Power

Low power measurements: As of 6/10/05 The low power measurements were done with 1GHz oscilloscope via 2m RG241 cable. The high power measurements were done with power meter via approx. 40dB attn. The data in the tables is corrected for attenuation.

Nucleus	SGU1 output	SGU2 output	SGU3 output	SGU4 output	Router 2 output	Amplifier input
13C	1.0V					1.09V
1H		860mV				960mV
15N			960mV		1.23V	1.45V
2H				960mV	1.01V	980mV

High Power

High power measurements: As of 6/10/05

Measurement description	BLAX1 (13C), W	BLAH (1H), W	BLAX2 (15N), W	BLAX3 (2H), W
amplifier output @ -6dB no attenuation	560	103	422	397W
amplifier output @ -6dB with attenuation	8dB, 260	14dB, 17/18.7	3dB, 365/394	8dB, 100
probe input @ -6dB with attenuation	127/146	8.4	205/220	20/21
amplifier output with attn from -6dB to +6dB				72 35.6 18.1 9 4.6

Output of all amplifiers was fairly linear in the -6dB to +6 dB range

Added:

>
>

Linearity Check

CARBON

-6db	10.4
-5.5	10.7
0	21.6
6	43.7

NITROGEN

-6

48.75

TUNED but NOT MATCHED

Pw is very long!!!

Calibrated with a standard sample:

-6db	48.5
-3	77.0
0	112.5
6	226.0

Deuterium

-6	149us
2.13	380us

Previous Measurements

1H db	@Amplifier 2	@probe (W)
-6	86	45
-6	-	20 after 10db was added	for cryoprobe
13C db	@Amplifier 1	@probe
-6	480	280
db	@Amplifier 5	@probe
-6	255	-
db	@Amplifier 6	@probe
-6	165	-
15N db	@Amplifier 5	@probe
-6	420	250
db	@Amplifier 1	@probe
-6	590	-

Date	Action taken	comments

13C db	@Amplifier 1	@probe
-6	-	300.3
-3	-	150.0
0	-	71.2
6	-	17.8

Date	Action taken	comments
4/28/05	Pulse Calibration was done with CORRECT cortab file	PRETTY LINEAR!!!!

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-- MichaelGoger - 13 Dec 2005

Revision 113 Dec 2005 - Main.MichaelGoger

META TOPICPARENT	name="NmrStaffnotes"