Row 1
Current PKT TIME, Control Computer command count and clock

Row 2
Contains real-time packet counts for instrumnet APIDs 77(0x4D), 78(0x4E)
and spacecraft APIDs 10(0xA) and 11(0xB).

S/C (NEB)
All s/c components have been operated at 22-34 volts however,
the nominal on-orbit voltage is 31.5 volts. During the charge
and discharge cycles of eclipse season, this range will vary
from 25.5 to 32 volts.

The ON status is that of the non-essential bus. During normal
operations, it should be ON. Go To Sample Page

DPU
This should normally be ON. It is all the non-heater
power to the instrument. The instrument takes about 0.7
Amps when the camera is off, and about 1.0 Amps with the
camera on. When mechanisms are operated this current
will increase. For instance if a focus series is done
the current increases intermittently to almost 2 Amps. Go To Sample Page
Op Htr
There are 7 different operational heaters.
Zones 1 thru 5 each draw about 0.61 amps, Zone 6 about 0.21
A, and Zone 7 (which warms the CCD) draws 0.34 amps. The
heaters are turned on and off by the DPU software as described
in file:/tsw/html/egse/software/ThermalControlRequirements.html.
The ops htr bus should be ON as indicated, supplying power to
all heater circuits when needed.
Go To Sample Page
Wax Act:
This should normally be OFF. The wax actuators are
used to release the latches that hold closed the doors
on the Filter Chamber. An actuator takes about 0.5 Amps
when it's powered. If the actuator is shorted (such as
when the disarming plug is installed) the power supply
puts out about 0.2 amps. Go To Sample Page
Ins Surv:
This should always be ON
but not drawing any real power because the
operational heaters will keep things adequately warm. Go To Sample Page
CCD Dec:
This (CCD Decontamination Heater) should be OFF except
for during a deliberate bake out. There are 2
decontamination heaters on the CCD header. They may be
turned on individually or together. The heaters are 6 & 9
Watts. The expected current is:
Heater 1 0.35 A
Heater 2 0.47 A
Both 0.71 A Go To Sample Page

INSTRUMENT VOLTS:
These are the voltages within the TRACE instrument as
measured by the instrument's A to D converter. Note
that the instrument's A to D converter gives a little
different answer depending on weather or not the
PZT +72 volts is on or off. Except for the PZT +72
which normally reads about +70, the voltages should
read within a half volt of nominal. Go To Sample Page

TEMPERATURES:

Aft S/C Int:
*IOCCDHIT SC-T-TH10 Red Limit: +45; nominal: 15C

DPU Conv:
*ITDPTH15 TR-DPU-TH15 Red limits: -20 +60; nominal: 35C

Tel CONV,S/C:
*IOINDPUET SC-DPU-TH02 Red limits: -20 +50; nominal: 25C

MGF2(PRT): MgF2 filter frame, 3 o'clock part of frame.
The thermistor is bonded to the frame.
*ITTEPR1 TR-T-PRT01 Red limits: -10 +45; nominal: 25C

CCD ELEC,S/C: CCD camera electronics, instrument side of camera.
*IOINCCDET SC-T-TH03 Red limits: -10 +45; nominal: 15C

Pri Mirror: Primary Mirror triangle mount
*ITTETH4 TR-T-TH04 Red limits: -5 +45; nominal: 15C

Go To Sample Page

MECHANISMS & CCD:
In interpreting the following be aware that the
telemetry samples are 5 seconds apart. A single
telemetry point for an encoder position may have
been sampled while a device was moving and thus
may not be a "valid" value. Likewise an individual
current reading may have been sampled while a motor
was starting. Go To Sample Page
Current: This is the current to all the mechanisms, measured
by the instrument A to D converter. Currents up to
1.1 Amps are common but rarely caught by the page snap.
Go To Sample Page
FW: The encoder readings of the 2 filter wheels. These
encoders will read 255 right after the mechanisms
are reset. Valid positions are:
FW_1 (FWD) FW_2 (AFT)
----------------- ---------------------
1: Open {19} 1: Open {125}
2: 1600 A {55} 2: 1216 A {17}
3: Aluminum {91} 3: Aluminum {53}
4: 1550 A {127} 4: Fused Silica {89} Go To Sample Page
WM: The encoder readings of the 2 wedge motors. These
encoders will read 255 right after the mechanisms are
reset. Valid positions are from 0 to 179. Go To Sample Page
QS: The encoder reading of the Quadrant Selector. This
will read 63 right after a reset. Valid positions
are:
Quadrant
--------------------
A:171 Angstroms {28 or 29}
B:UV {19 or 20}
C:195 Angstroms {10 or 11}
D:284 Angstroms {1 or 2} Go To Sample Page
Shutter pos: The encoder reading of the shutter:
MOVE JUST MADE POSITION
-------------------------------
RESET 23 or 24
CCW WIDE EXPOSURE 23 or 24
CW NARROW EXPOSURE 23 or 24
CW WIDE EXPOSURE 51 or 52
CCW NARROW EXPOSURE 51 or 52
The shutter is open when the encoder reads 0 or 3.
This should never be the case for longer than the
desired exposure time. Go To Sample Page
Focus Counter: This is a software counter in the instrument
computer. A reading of 100 indicates that the
focus mechanism is in the center position.
Nominal values (of best focus) are:
EUV: 112
UV/WL: 104
1216: 104 Go To Sample Page
CCD Amp & lev: Level 8 is nominal for amplifier A, level 3
is nominal for amplifier B. Most data will be
collected with amplifier A. Go To Sample Page

CCD Temp,S/C: The temperature of the CCD Header Low range SC-T-TH09
*IOCCDLOT SC-T-TH09 Red Limit: +30; nominal: -60C Go To Sample Page

GUIDE TELESCOPE: Balanced diodes indicate TRACE is still in Fine Sunpoint Mode.
D1 and D2 (East/West) will be roughly equal (2-3 DN) as will
D3 and D4 (North/South). D1 and D2 usually have a stronger
signal and run a few DN higher than D3 and D4.

Normal ISS operations is performed in closed loop using low gain.
Sometimes the loop is opened for calibrations or eclipses, keeping
large movements from pinning the 2ndary mirror.

Guide Telescope average error signals are averaged at 300 Hz before
being sent to the ISS. Values of ~132 represent midrange and each DN
represents ~0.6 arcsec of movement.
Go To Sample Page
CONTROL COMPUTER:
Ver:Patch Flight Software version and patch
numbers. Currently 01:34
Cmnd Count: Number of commands received by the CC
Non Vld Cmnd: Non Valid Command/Error
Pict St Mach: Picture state machine step
This will usually change from 0 to 'C' then
back to 0. If CC detects a timeout (shutter
did not close or DHC did not respond within
45 seconds) the code will be shifted by 4 bits
e.g. 'C' would change to 'C0'
Config Reg:
Bit_____Function_______Init__Active__Jumper__Notes
SD0 C/W boot s s na s - software determined
SD1 RAM bank 0 h 31 h - high
SD2 ECAD/ED 0 h 29
SD3.... PROM bank 0 h 28
SD4 Memory Error m s 25 m - memory status
SD5 WDOG count en 1 h 26
SD6 RS232 !enable t s na t - test connector
SD7.... Spacecraft load 0 s 27
SD8 CC reset (SC interface only)
Clock Sec: If this isn't incrementing every couple of
seconds something is wrong. Go To Sample Page

SEQUENCE:
Seq Status: A code indicating if a sequence is
running (0x8000) / paused (0x8800 or 0x0800) / Inactive (0x0000)
Seq ID: ID of currently executing sequence or
the last sequence run.
Top Seq: Main calling sequence
Num of Seq: The sequence number of the current
sequence in the start seqence command.
A start sequence command can start upto
12 sequences to run.
Targ ID: Target ID (Note that only 16 bits of the ID
are used).
Frame ID: Frame Definition Block ID
Frame Number in Seq: Number of images taken by current sequence
Frame Number: Total number of images taken since power up
Exposure: Shutter exposure in units of 1/4 msecs. For short exposures
taken by (multiple) sweeps of the narrow slit this number is
zero.

DHC
Firm Ver:Pat: DHC firmware version and patch numbers
Currently 26:05.

Inst Ver:Pat: The version and patch number of DHC queue program.
Currently 01:2D.

Status: Indicates DHC mode
40 - Idle
48 - Run
49 - Error

Error: DHC Error System Status. The common values are,
0x1800 - Queue Disabled
0x3800 - Queue Enabled - No downlink
0x3A80 - Packet Active, Downlink in progress
0x3880 - Downlink in progress
A 9 in the first digit indicates fatal error
A 7 or 5 in the first digit indicates a non-fatal error

ERegs 1: DHC error code
2: Instruction Op-Code which caused the error
3: DHC system Mode
4: DHC DMA status or instruction parameter
5: DHC queue address (of next instruction)
where the error occured. Go To Sample Page

Mass Memory: This is the amount of memory in Mbytes currently stored in the
s/c chronological partition of bulk storage. This buffer can
hold 181 Mb and most sequences are written to stop taking images
at 170 Mb.

Sample Page:
################################################################################
SNAPSHOT TAKEN ON: Tue Jun 8 07:21:17 1999 GMT: 11:21:17
SNAPSHOT FORMAT FILE: /tsw/egse_v5.2/screen_lib/mini.scr
ORIGINAL SNAPSHOT FILE: /td47/log/snaps/19990608_1121_mini
ROWS: 23 COLUMNS: 80
################################################################################

1999.06.08_11:21:14.34_GMT CMD 58060 CLK DD2Bx
HK4d/4e 88251 17665 MINI PAGE (TRACE SUMMARY STATUS) SC0a/0b 17654 88271

S/C (NEB) on 31.5v TEMPERATURES GUIDE TELESCOPE SEQUENCE
DPU on 0.93a Aft S/C Int 13.0c D1 D2 D3 D4 Seq Status 8000x
Op Htr on 0.07a DPU Conv 35.4c 107 107 104 104 Seq ID 0000122Fx
Wax Act off 0.01a Tel Conv,S/C 22.4c Status Reg 17x Top Seq 0000122Ex
Ins Surv on 0.06a MgF2 (PRT) 24.4c Loop closed Num of Seq 1
CCD Dec off 0.01a CCD Elec,S/C 11.5c gain low Frame ID 1C0Ax
INSTRUMENT VOLTS Pri Mirror 13.3c Avg A B C Frame in Seq 1820
App +5 5.22v Error: 132 134 133 Frame #: 1841158
App +15 14.9v MECHANISMS & CCD Guider Dev Gain Exposure 512_ms
App -15 -15.0v Current 0.009a X: 0 61.00 DHC
PZT +72 on 69.7v FW 91/125 Z: 0 58.00 Firm Ver:Pat 26:05
Mec +15 on 15.0v WM 126/136 CONTROL COMPUTER Inst Ver:Pat 01:2d
CCD +5 on 5.06v QS 171 A, 28 Ver:Patch 01:34x Status 48x
CCD +15 15.2v Shutter pos 51 Cmnd Count 58060 Error 3800x
CCD -15 -15.1v Focus Counter 112 NV Cmd/Err 0/0001x Warn/Err 27 /153
CCD +30 30.1v CCD Amp A lev 8 Pict St Mach 00x ERegs 1 2 3 4
CCD Temp,S/C-59.6 Config Reg 61x 0002 3474 0000 0000
SeqName: RAS.dynamics_4 Chron(lt 181) 171
TrgName: top2.pos1 Class: 0 MassMem Stat 4249
DHC Error: HSSSWAP:_Main_memory_overflow