Getting default value for a TV from another resource

@EVAL $resourceId = 1;$tvId = 40;$tv = $modx->getObject('site_tmplvars', $tvId);$val = $tv->getValue($resourceId);return $val

@EVAL $page = $modx->getObject('modResource', 1);return $page->getTVValue('testing');

@SELECT value FROM modx_site_tmplvar_contentvalues WHERE tmplvarid = 40 AND contentid = 1

<?php
$tv = $modx->getObject('modTemplateVar', array('name'=>'MyTv'));
$val = $tv->getValue($modx->resource->get('id'));
if (! empty($val)) {

$output = $val;
}else{
$page = $modx->getObject('modResource', 1);
$id = $page->get('id');
$tv = $modx->getObject('modTemplateVar',array('name'=>'MyTv'));
$val = $tv->renderOutput($id);

$output = $val;
}
return $output;