Operating the XLTEK Trex™ HD Video Ambulatory System
This guide provides an overview of the steps needed to operate the XLTEK Trex HD video ambulatory system,
including starting and terminating an ambulatory study, and uploading EEG and video data. This system is used to
record EEG and/or PSG signals in synchrony with high definition (HD) video.
The Trex HD camcorder can be used for ambulatory video recordings only. Video data is recorded to the camcorder’s
internal memory or SD memory card and uploaded to the acquisition station after the study has ended.
Main System Components
XLTEK Trex HD amplifier
Trex HD video adaptor
SONY HDR-PJ790V camcorder
SONY Infrared light attachment
SD Memory card for camcorder (128GB SDXC card)
Camcorder tripod and clamp
Carrying case and Trex pouch
Preparing Trex HD Amplifier
1. Insert two brand new AA batteries into the Trex HD amplifier and connect it to acquisition
station using USB cable.
2. In Natus Database select TOOLS > AMBULATORY MANAGER:
a. For Headbox, select Headbox Connected to SB.
b. Ensure there are no studies displayed and that Memory Used indicates 0%. To erase
studies stored in Trex HD, click “Clear Memory…”
1. Plug camcorder into power supply and turn power ON.
2. Insert the 128GB SDXC* memory card into camcorder.
3. With camcorder in MOVIE
mode set the settings using the LCD touch screen panel
according to “CAMCORDER SETTINGS CHECKLIST” box. Ensure that Infrared Light
attachment is connected to camcorder and review settings for NightShot mode indicated
under “INFRARED LIGHT ATTACHMENT.”
Camcorder Settings Checklist†
MENU > IMAGE QUALITY/SIZE
MODE > LONG TIME LP
SETTING > HD QUALITY
MENU > CAMERA/MIC
SETTINGS > NIGHTSHOT LIGHT > ON
> AUDIO MODE > 2CH STEREO
*Only use memory card provided by Natus.
MENU > SETUP
Starting Ambulatory Study with Patient
1. Connect Trex HD and camcorder to acquisition station. Ensure camcorder is powered ON.
2. Verify the camcorder’s LCD screen displays “Mass Storage Connected”.
If it does not go to MENU > SETUP > CONNECTION > USB Select > USB Connect.
3. In Natus Database, start a new study by selecting New EEG or New Sleep.
4. Complete Study Information form and:
a. Under Headbox Name, select Headbox Connected to USB.
b. Under Video Source, select Use ambulatory video.
5. Click START to start acquisition. An Ambulatory Video Test will begin (this may take
several minutes). You can also re-start the video test by putting the camcorder in
“Mass Storage Connected” display and choosing CONTROLS > VIDEO TEST.
a. When prompted, stop USB connection by pressing USB Connect on camcorder’s
LCD screen. Do not physically disconnect USB cable!
b. Follow prompts as requested to complete video test, then disconnect camcorder’s
USB cable. If prompted to put the camcorder in movie recording mode, press the
camcorder icon on the LCD screen.
6. Set up patient and perform other startup protocols as described in your NeuroWorks
manual (such as Impedance Check).
continued on next page
SETTINGS > MEDIA SELECT > MEMORY CARD
SETTINGS > FORMAT > MEMORY CARD
99 MEDIA SETTINGS > FILE NUMBER > RESET
99 CONNECTION > USB CONNECT SETTING > MASS
99 GENERAL SETTINGS > BEEP > OFF
99 GENERAL SETTINGS > DEMO MODE > OFF
Infrared Light Attachment
two AA batteries
99 BRIGHT: LEVEL 2
99 MODE: IR
99 MODE: IR
99 BRIGHTNESS: MID-POSITION
†Set with camcorder in MOVIE mode.
Starting Ambulatory Study with Patient (continued)
7. Start ambulatory mode by going to CONTROLS > START AMBULATORY STUDY and only
then disconnect Trex HD from acquisition station. To verify that Trex HD is recording in
ambulatory mode and that video is successfully paired, ensure:
a. Amber light ● on side of Trex HD is flashing (every 2 sec).
b. Blue light ● on Trex Video Interface is flashing (every 10 sec).
8. Review camcorder operation with patient and provide instructions regarding battery
replacement/capacity of Trex HD, camcorder and IR light (model HVL-LEIR1 only). Make
sure the patient takes the Patient Guide (009320) with them. To preserve battery life, the
camcorder may be packed in carry case with power on but LCD screen closed during
9. Remind the patient to not close the LCD screen when they expect video to be recording.
Uploading Ambulatory Study
1. Remove batteries from Trex HD. Connect Trex HD and SD card to acquisition station
where study was started. You must connect SD card and complete up to step 3.c in
order to link video with study data. Video upload may be paused and resumed
only after this step!
2. Video upload options:
a. To upload via card reader: Remove SD card from camcorder and connect to
acquisition station via an internal or external USB 2.0 or 3.0 card reader.
b. To upload via camcorder: Connect camcorder via USB cable and verify the
screen displays “Mass Storage Connected”. If it does not, go to MENU > SETUP >
CONNECTION > USB Select > USB Connect.
3. In Natus Database, click CONTROLS > AMBULATORY MANAGER.
a. For Headbox, select “Headbox Connected to USB”.
b. Click END STUDY.
c. Click UPLOAD STUDY.
After upload of EEG data (5-10 min for 96hr study), a Video Upload tab appears if
video is detected and video upload begins. In Video Upload tab, you may Pause
video upload at any time and resume later. See “Quick Flow using Multiple SD
Cards” if you wish to pause video upload and start another study.
4. If video was partially uploaded, resume by right-clicking on the study record in
Natus database and selecting Upload Video.
5. When video upload is complete, the Video upload has been completed message
Quick Flow using Multiple SD Cards
You may pause video upload at any time and start a new
video ambulatory study with another SD card. You cannot
start a study during video upload! After initiating video
upload (“Uploading Ambulatory Study”, step 3.c):
Verify that EEG upload is complete by opening the study
for Review in Natus Database.
Open Ambulatory Manager and disconnect Trex HD by
clicking Disconnect and Yes to clear memory on Trex HD.
Physically disconnect Trex HD and remove batteries to
power off completely.
In Video Upload tab, click Pause to pause video upload.
Disconnect or remove SD card.
Insert another SD card into camcorder, and start a
new study by initiating at Step 1, Preparing Trex HD
After starting new ambulatory study and disconnecting
Trex HD, any incomplete video upload may be resumed.
Connect the appropriate SD card and proceed to Step 4
under Uploading Ambulatory Study.
Notes and Tips
starting a study, only one SD card should be connected via camcorder – do NOT connect additional cards through any other device!
new study cannot be started while a video upload is in progress. Pause any video upload and resume it after the new study is started to
ensure quicker turnaround of recording equipment.
99 When uploading video, multiple SD cards may be connected via card readers or camcorders – only the video linked to the selected study
will be uploaded.
99 Studies with partial video uploaded display the
icon in Natus Database.
99 EEG data may be reviewed before video upload is completed. Video is available for review as it gets uploaded, indicated by the solid blue
video recording bar near the top of the review window.
99 Prior to starting any new study, disconnect Trex HD from acquisition station and remove batteries to power off completely.
99 A USB 3.0 card reader connected to a USB 3.0 port may provide upload speeds up to 5x faster than a camcorder.
Natus Medical Incorporated
Excel-Tech Ltd. (XLTEK)
2568 Bristol Circle, Oakville
ON L6H 5S1 CANADA